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Humans are diurnal. We foraged for fruit during the day and slept when the sun went down, so it's not very clear that being able to see infrared would help. P
by rwmj 2y ago
Humans are diurnal. We foraged for fruit during the day and slept when the sun went down, so it's not very clear that being able to see infrared would help.
Plus evolution doesn't work by automatically adding the best body enhancements like a superhero. It might have happened that the genes for making red cones got duplicated (making one person a tetrachromat) and then that person had lots of children and those genes gradually evolved into infrared receptors and were successful, and the mutation was not too much of a burden in other ways. Or that's all very very unlikely and it simply didn't happen.
- defrost 2y ago> Humans are diurnal. We foraged for fruit during the day and slept when the sun went down Moonlight is plenty bright enough to see by, many people (eg: Sama-Bajau) catch non fruit food (such as squid) at night with a small oil | candle light and have done so for longer than European recorded history. Aboriginal hunters in Australia catch particular animals that come out in the cool of the night using the moon to see by.
- mharig 2y agoAnd do not forget the good old THC night vision enhancer. https://www.sciencedirect.com/science/article/abs/pii/S0378874104001503 https://www.sciencedirect.com/science/article/abs/pii/S03788... But also see this https://www.nature.com/articles/s41598-021-81070-5 https://www.nature.com/articles/s41598-021-81070-5 YMMV